In order to be able to do anything at all, you will first have to put some firmware. In my opinion, there is no reason not to use the latest rc3 firmware from here
http://updates.irexnet.com/beta/dr1000s/
Then I would immediately install mackx's hack from message #199 of this thread
https://www.mobileread.com/forums/sho...=92443&page=14
and you will have the latest "operating system".
Happy reading!